Improvement in monkey-wrenches



W. MfGRBBN.

Monkey-Wrench.

No. 216,516. I Patented June 17, 1879.

UNITED STATES PATENT OEEToE.

WILLIAM M. GREEN. OF STEVENS POINT, WISCONSIN, ASSIGNOR OF ONE- HALF` HIS RIGHT TO SAMUEL C. SAMPLE, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN MONKEY-WRENCH ES.

Specification forming part of Letters Patent No. 216,516, dated June 17, 1879; application filed April 28, 1879.

To all 'whom t may concern:

Be it known that I, WILLIAM M. GREEN, of Stevens Point, State of IVisconsin, have invented a new and useful Improvement in Monkey-Wrenches, of which the following is a full, clear, and exact description, which will enable those skilled in the art to construct and use the same, reference being had to the annexed drawing, which lforms a part of this specifica tion, and which shows a longitudinal section of a monkey-wrench containing the invention.

In the-drawing, A represents a bar; B, the sliding jaw thereon, and C the ixed jawsecured to the end of said bar A. Dis the handle, and I-I the ferrule. All of these parts are constructed in the usual and well-known manner. E is a left-hand screw, and Fis the head thereof. G is a ri ght-hand screw, with one end permanently attached to the ferrule H. The screw E extends into a corresponding female screw in the hollow part of the shank of the sliding` jaw B. This screw E and its head F are made hollow, which hollow is circular, and provided with a female screw to lit the screw G.

The invention relates to the combination and arrangement, with respect to the other parts of the wrench, ofthe screws E and G as a means for sliding and adjusting the jaw B to any part of or point upon the bar A, for the purpose of making the distance between the sliding and the fixed jaws correspond to any nut or-bolt-head it is desired to operate upon with the wrench,

The screw E, by means of the head F, is rotated upon the screw G, which is stationary;

and one of said screws being a right-hand It is immaterial which of the. screws is a right-hand screw andwhich a left-hand, as the reverse of the order shown would produce the same result.

As the head F of the screw E' moves along the bar A toward and from the ferrnle and on the screw G, that part ot' the bar alongwhich the head thus plays back and forth may be made concave, to correspond' with the periphery of the screw-head.

Having thus described my invention, what I claim, and desire. to secure by Letters Patent, is-

As an improvement in wrenches, the screw G, rigidly attached to the i'errule H, in combination with the screw E, having an internal screw and a head, E, said screw E turning in the hollow part of jaw B as head Fis rotated, one of said screws E and G being a righthand screw and the other a left-hand screw, and both operating together to propel jaw B -toward or from the other jaw, as head F is rotated in one or the other direction, substantially as and for the purpose set forth.

WILLIAM M. GREEN.

Witnesses J oHN H. WHIPPLE, C. BRowNELL. 

